Common symptoms of poisoning in dogs include vomiting, diarrhea, excessive thirst and urination, sudden onset of muscle tremors or seizures, and weakness or lethargy. Poison generally affects a dog's kidneys, liver and brain, but specific symptoms depend on the type of poison, according to Pet Poison Helpline.
Dogs that ingest poison may experience gastrointestinal symptoms, such as a lack of appetite or excessive drooling, and symptoms of internal bleeding, such as a rapid heart beat or coughing up blood. Kidney and liver failure is common, and symptoms include decreased urination, bad breath, jaundice or yellow gums, black stool and changes in behavior, reports Pet Poison Helpline. Common symptoms of the ingestion of rat poison in dogs include loss of appetite, paralysis in the back legs, impaired movement and muscle
tremors, states PetMD.
Antifreeze, which is found in homes and cars, is one of the most common causing of poisoning in dogs. Ingesting ethylene glycol, the ingredient that makes antifreeze toxic, causes symptoms such as delirium, uncoordinated movements and drunken behavior, vomiting, tremors and seizures, rapid heart beat and diarrhea. Kidney damage is the leading cause of death in dogs that ingest antifreeze, explains PetMD. Immediate treatment increases a dog's chances for survival.